Synthesis and Characterization of Nano-CeO<sub>2</sub> under Different Reaction Time

以硝酸铈为铈源，硝酸为酸性控制剂，在酸性条件下，利用水热法制备萤石型立方相球状二氧化铈。通过改变反应时间，制得了不同条件下的球形二氧化铈产品。通过X射线衍射仪(XRD)，扫描电子显微镜(SEM)，拉曼光谱仪(Raman)，紫外可见分光光度计(JV-DRS)对产物的结构，形貌和性质进行表征和研究。结果表明，在酸性条件下，通过改变反应时间能够控制二氧化铈样品的形貌及性能。 With cerium nitrate as the source of cerium and nitric acid as the acidic control agent, under acid condition, the fluorite cubic phase prepared by hydrothermal method globular ceria, by changing the reaction time, without changing the other reaction conditions, we have made with spherical cerium dioxide products under different conditions. Through the X-ray diffraction (XRD), scanning electron microscope (SEM), Raman spectroscopy (Raman), uv-vis spectrophotometer (JV-DRS) on product structure, morphology and properties were characterized and studied. The results showed that under acidic condition, changing reaction time can control the morphology and performance of the nano-CeO2.